use std::io::{self, Read};

fn read_usize<R: Read>(reader: &mut R) -> usize {
    reader
        .by_ref()
        .bytes()
        .filter_map(|b| b.ok())
        .skip_while(|&b| b < b'0' || b > b'9')
        .take_while(|&b| b >= b'0' && b <= b'9')
        .map(|b| (b - b'0') as usize)
        .fold(0, |res, n| res * 10 + n)
}

fn read_u64<R: Read>(reader: &mut R) -> u64 {
    reader
        .by_ref()
        .bytes()
        .filter_map(|b| b.ok())
        .skip_while(|&b| b < b'0' || b > b'9')
        .take_while(|&b| b >= b'0' && b <= b'9')
        .map(|b| (b - b'0') as u64)
        .fold(0, |res, n| res * 10 + n)
}

fn main() {
    let stdin = io::stdin();
    let mut stdin = stdin.lock();

    let n: usize = read_usize(&mut stdin);
    let sum: u64 = (0..n).map(|_| read_u64(&mut stdin)).sum();

    println!("{}", sum);
}